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Add user-friendly password validation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| // SPDX-FileCopyrightText: 2017-2025 City of Espoo | ||
| // | ||
| // SPDX-License-Identifier: LGPL-2.1-or-later | ||
|
|
||
| import { PasswordConstraints } from './generated/api-types/shared' | ||
| import { isPasswordStructureValid } from './password' | ||
|
|
||
| describe('isPasswordStructureValid', () => { | ||
| const unconstrained: PasswordConstraints = { | ||
| minLength: 1, | ||
| maxLength: 128, | ||
| minDigits: 0, | ||
| minLowers: 0, | ||
| minSymbols: 0, | ||
| minUppers: 0 | ||
| } | ||
| it('checks minLength correctly', () => { | ||
| const constraints = { ...unconstrained, minLength: 4 } | ||
| expect(isPasswordStructureValid(constraints, '123')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1234')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '12345')).toBeTruthy() | ||
| }) | ||
| it('checks maxLength correctly', () => { | ||
| const constraints = { ...unconstrained, maxLength: 4 } | ||
| expect(isPasswordStructureValid(constraints, '12345')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1234')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '123')).toBeTruthy() | ||
| }) | ||
| it('checks minLowers correctly', () => { | ||
| const constraints = { ...unconstrained, minLowers: 1 } | ||
| expect(isPasswordStructureValid(constraints, '1_2')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1A2')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1a2')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '1ab')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '1ä2')).toBeTruthy() | ||
| }) | ||
| it('checks minUppers correctly', () => { | ||
| const constraints = { ...unconstrained, minUppers: 1 } | ||
| expect(isPasswordStructureValid(constraints, '1_2')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1a2')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, '1A2')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '1AB')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '1Ä2')).toBeTruthy() | ||
| }) | ||
| it('checks minDigits correctly', () => { | ||
| const constraints = { ...unconstrained, minDigits: 1 } | ||
| expect(isPasswordStructureValid(constraints, 'abc')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, 'a1c')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, 'a12')).toBeTruthy() | ||
| }) | ||
| it('checks minSymbols correctly', () => { | ||
| const constraints = { ...unconstrained, minSymbols: 1 } | ||
| expect(isPasswordStructureValid(constraints, '123')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, 'abc')).toBeFalsy() | ||
| expect(isPasswordStructureValid(constraints, 'a#c')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, 'a#2')).toBeTruthy() | ||
| expect(isPasswordStructureValid(constraints, '💩')).toBeTruthy() | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // SPDX-FileCopyrightText: 2017-2025 City of Espoo | ||
| // | ||
| // SPDX-License-Identifier: LGPL-2.1-or-later | ||
|
|
||
| import { PasswordConstraints } from './generated/api-types/shared' | ||
|
|
||
| export function isPasswordStructureValid( | ||
| constraints: PasswordConstraints, | ||
| password: string | ||
| ) { | ||
| function count(iter: Iterator<RegExpMatchArray>) { | ||
| let result = iter.next() | ||
| let count = 0 | ||
| while (!result.done) { | ||
| count += 1 | ||
| result = iter.next() | ||
| } | ||
| return count | ||
| } | ||
| if (password.length < constraints.minLength) return false | ||
| if (password.length > constraints.maxLength) return false | ||
| // \p{...} check unicode categories: https://unicode.org/reports/tr18/#General_Category_Property | ||
| if (count(password.matchAll(/\p{Ll}/gu)) < constraints.minLowers) return false | ||
| if (count(password.matchAll(/\p{Lu}/gu)) < constraints.minUppers) return false | ||
| if (count(password.matchAll(/\p{Nd}/gu)) < constraints.minDigits) return false | ||
| if (count(password.matchAll(/[^\p{L}\p{N}]/gu)) < constraints.minSymbols) | ||
| return false | ||
| return true | ||
| } |
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